2 files changed, 2 insertions, 2 deletions
diff --git a/src/0x.ts b/src/0x.ts
index ff3220757..bde9360c3 100644
--- a/src/0x.ts
+++ b/src/0x.ts
@@ -287,7 +287,7 @@ export class ZeroEx {
                     const logsWithDecodedArgs = _.map(transactionReceipt.logs, (log: Web3.LogEntry) => {
                         const decodedLog = this._abiDecoder.decodeLog(log);
                         if (_.isUndefined(decodedLog)) {
-                            throw new Error('Unknown log');
+                            return log;
                         }
                         const logWithDecodedArgs: LogWithDecodedArgs = {
                             ...log,
diff --git a/src/types.ts b/src/types.ts
index 4f9c6714d..7e370e3f1 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -410,5 +410,5 @@ export interface DecodedArgs {
 export interface LogWithDecodedArgs extends Web3.LogEntry, DecodedArgs {}
 
 export interface TransactionReceiptWithDecodedLogs extends Web3.TransactionReceipt {
-    logs: LogWithDecodedArgs[];
+    logs: Array<LogWithDecodedArgs|Web3.LogEntry>;
 }